Carbureter.



E.H.ARQUEMB0URGQ CARBURETER.

APPLICATION men JULY 9, 1912.

2 SHEET$SHEET I.

1,173,762. Patented Feb. 29,1916.

WITNESSES INVENTOR Emile Henr-iArquer-nbow- BY V60 ATToFzN EYS E. H. ARQUEMBOURG.

CARBURETER. APPLICATION FILED IULYQ, 1912.

Patented- Feb. 29, 1916.

A-r-rorzN BY 5 WITNESSES I n era rnnr men EMILE HENRI ARQUEMBOURG, OF PARIS, FRANCE, ASSIGNOR TO'SOCIE TE JU LIES GRD'UVELLE, H. ARQ'UEIVIBOURG & GIE, 0F PARIS, FNCE.

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Specification of Letters Patent. Patentadi Feb. 29, 19116.,

Application filed July 9, 1912. Serial No. 708A27.

To all whom it may concern Be it known that l, EMILE HENRI An- QUEMBOURG, of 71 Rue du Moulin Vert, in the city of Paris, Republic of France, engineer, have invented an Improvement in Carbureters for Explosion-Motors, of which the following is a full, clear, and exact description.

This invention has for its object an improvement in carburetors for explosion motors and particularly to carbureters with automatic air intake, for the purpose of allowing said carburetors to give a constant carburatio'n at any speeds of the motor whether running light or under a load.

In the usual. carbureters, it is generally noticed that the spraying nozzle, devised for giving. the best'running at a high speed under a load, offers a too large cross section of outflow for allowing a good middle running and. especially a regular working in case of the motor running light or at a very reduced speed.

The present improvement remedies this inconvenience and consists in the use of a special regulating device proportioning to the power of the motor the cross section of outflow of the gasolene arriving at the spraying nozzle. This regulating device is essentially characterized by a needle valve capable of entering to a greater or less extent into an orifice interposed in the path of'the gasolene, between the constant leveltank and thespraying nozzle, and actuated either mechanically through the throttle cook, or pneumatically through the medium of a piston actuated by the differences or" depression which are produced in the mixing chamher or between the latter and the motor.

The accompanying drawin s show by way of example several methods of putting the present invention into practice.

Figures 1 and Q illustrate in vertical section and in end elevation respectively a carbureter provided with the present regulating device with mechanical control of the needle valve. Figs. 3 and 4 illustrate diagrammatically two forms ofrealization of the pneumatic operating device for actuating the needle valve.

In the form of carburetor illustrated in Fig. 1 a designates the constant level tank,

b is the spraying nozzle, 0 the biconical mixing chamber, 0? the automatic air intake provided with balls, 6 the throttle cock for retarding the outflow. In the path of the gasolene, between the constant level tank a and the spraying nozzle 6, is provided a cavity 7 inclosing a tubular body 9, terminated at its upper part by a conical head pressing, under the action of a returning spring it, against a. shoulder 2 on the wall of the cavity 7". This returning spring 72, takes the gaso lene coming from the constant level tank a; moreover, the said tubular body 9 is perforated with ports '9 allowing the gasolene which has passed through the orifice g to flow to the spraying nozzle b. @p posite this orifice g is mounteda-vertically movable needle valve is capable of entering to a greater or less extent into said orifice. The maximum opening of the orifice g sensibly corresponds to the best running at high speed under a load, that is to'say to the case in which the automatic air intake is entirely open and in which the depression in the mixing chamber 0 is suiiicient for, insuring a proper atomization while remaining as low as possible. On the contrary for running at the lowest speed, in which the automatic air intake is entirely closed, the needle valve is is engaged into the orifice 9 so as to considerably diminish the cross section of passage of the gasolene; in this case, the depression in the carburetor, although being low, must, however,'be sufficiently high for overcoming the resistances due to capillary action and insuring a continuous spraying of the gasolene. The needle valve 7 may be operated either mechanically or pneumatically.

In the mechanical operating device illustrated in Figs. 1 and 2, the needle valve is urged upwardly by a returning spring Z and its upper end is constantly held in contact, by the action of this spring, against an abutment screw m carried by an arm n secured on a shaft 0 on the end of which is rigidly mounted a lever 72 the end of which fits against a cam g of suitable shape mountprovided an orifice g through which passes v lll) ed on the axis e of the throttle cock e By operating the abutment screw m, it is possible to efiect the initial adjustment of the suitablepenetration of the end of the needle is into the orifice 9 corresponding. to the running at a reduced speed.

Figs.' 3 and/t. illustrate two methods of realization of the pneumatic operating device foractuating the needle. valve k. In these two devices, the needle is is secured to the small arm of a bell crank 1' movable about an axis 8 the long arm of which is on the one hand urged by a returning spring "t and on the other hand is connected to a (Fig.3

-g. The respective positions of r u and of the spring t relatively piston a movable within a cylinder '0 communicating either with themixingchamber or with conduit pipe w beyond the throttle cock 6 (Fig. 4) The variations of depression either in the mixing chamber c"or'in the'conduit pipe 10, produced by the differences of speed of the motor, have for effect to determine a displacement of the piston u in one direction or the other,.'which displacement imparts, of the bell crank 1, an upward or a downward movement to the needle is which thus closes to a greater or less extent the mixing chamber 0 and in the conduit modified according to h as "pipe 'w vary in reverse direction, but always in a progressive manner.

It. is to be understood that the methods of "realization indicated above are given only byway of example and that they may be the 'difierent types of carbureters. I

Claims; 1. In a carbureter for and a spraying nozzle, a device for regulat-.

ing the cross-section of. outflow of the gasolene proportronally to'the power of the motor, comprislng an accessible. cavity provided in the path of the gasolene between" the constant level tank and the spraying.

through the medium HTX lQ OD motors, ncomb nation with 'adn t 1 tank of June, 1912.

nozzle,--a removable tubular member. in said cavity provided conical head perforated. with a central hole for the passage of the gasolene coming from the constant level tank, and side orifices formed opposite the conduit-pipe leadingto the spraying nozzle,--a coil spring pressing the conical head of said tubular member against a shoulder on the wall .of the cavity containing this tubular member,-a screw.-

. threaded plug closing said cavity and serving as a bearing for the coil.spring,a needle valve capable of being engaged to a greater or less extenti into the central hole ofthe conical head of the tubular member,and means for moving the needle valve and imparting to it displacements proportional to the power to be given' by the motor.

2. In a carbureter, the combination a tank, and a spraying nozzle, acavity being arranged between the tank and nozzle, of a removable tubular member in the cavity and having an aperture in its inner end and lateral apertures, a plug closing the cavity, means for holding thea pertured inner end of'the member against the shoulderof the cavity, and a needle valve engaging the aperture in the inner end of the said member.

a carbureter, the combination with .a tank, and a spraying nozzle, a cavity being arranged between the tank and nozzle, of

a removable member in the cavity and having its inner end provided with an opening through which the liquid from the tank passes to the nozzle, a closure for the cavity, means for holding the member in engagement with the shoulder at the inner end of the cavity, and a needle valve engaging the openingof the saidmember.

Thefforegoing specificatlon of my -1mprdvem'ent in carbureters for explosion mo'- 90 tors, signed by me this'twenty-second day EMILE HENRI ARQUEMBOURG.

Witnesses:

" H. O. Coxn, R. THIRIOT.-

at its upper part. with a with Y 

